Can the government force you to turn over your encryption passphrase or decrypt your data? The law surrounding police attempts to force decryption is developing at breakneck speed, with two major court decisions this year alone. This talk will start off with an in-depth explanation of the Fifth Amendment privilege against self-incrimination, its origins, and how it applies to government attempts to force disclosure of keys or decrypted versions of data in the United States. We'll also discuss law enforcement authority to demand passphrases and decryption of data stored with third parties, and survey key disclosure laws in other countries.